Constraints on the minimal supergravity model from nonstandard vacua

Howard Baer, Michal Brhlik, and Diego Castaño
Phys. Rev. D 54, 6944 – Published 1 December 1996
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Abstract

We evaluate regions of parameter space in the minimal supergravity model where "unbounded from below" (UFB) or charge or color-breaking minima (CCB) occur. Our analysis includes the most important terms from the one-loop effective potential. We note a peculiar discontinuity of results depending on how renormalization group improvement is performed: One case leads to a UFB potential throughout the model parameter space, while the other typically agrees quite well with similar calculations performed using only the tree level potential. We compare our results with constraints from cosmology and naturalness and find a preferred region of parameter space which implies mg̃725 GeV, mq̃650 GeV, mW̃1225 GeV, and ml̃R220 GeV. We discuss the consequences of our results for supersymmetry searches at various colliding beam facilities.

  • Received 29 July 1996

DOI:https://doi.org/10.1103/PhysRevD.54.6944

©1996 American Physical Society

Authors & Affiliations

Howard Baer, Michal Brhlik, and Diego Castaño

  • Department of Physics, Florida State University, Tallahassee, Florida 32306

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Vol. 54, Iss. 11 — 1 December 1996

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